T-Mobile EVS...Intel only???

[solodogg]

So, there is a discussion going on over on reddit as to whether the Qualcomm iPhone 8/X models support EVS on T-Mobile, and it would appear that they do not.

Is there anyone on here that has 2 Intel variant T-Mobile phones that could call between them, and try playing a tone above 8khz from the below link to see if it's audible or not? I tested this between my QC X and my wife's Intel 8, and was unable to hear anything either direction above 7600hz, but EVS is supposed to support up to 14khz. This could be the reason why there is a difference in sound quality between the Qualcomm and Intel iPhones this year

http://www.szynalski.com/tone-generator/

 

[winterny]

Absolutely interested to see the results if someone has access to two intel iPhone X on T-Mobile to try this out.

 

[solodogg]

I've now tried this between 2 QC X's and experienced the exact same results. 7500hz was perfectly audible, 7600hz was described as a "GSM noise" (basically static clicking type noise), anything higher was inaudible. I'd love to see 2 Intel devices test this to determine if the phone is canceling what it believes is noise, if T-Mobile is not utilizing full bandwidth EVS, or if it just flat doesn't work on the Qualcomm variant.

 

[solodogg]

Anyone that can test this? Someone has to have an Intel X on T-Mobile that can call someone else with another Intel X on the same network and try this theory. IMO, this could be the biggest Intel phone justification this year.

 

[solodogg]

test debunked...both QC and Intel uses EVS, but T-Mobiles implementation provides barely any sonic benefits over AMR-WB. T-Mobile utilizes EVS-WB 13.2kbps, which limits upper frequency bandwidth to 8khz, while AMR-WB 13.2 is limited to 7khz.